No, you’ve all got it all wrong. Abortion is the killing of ANOTHER. Suicide is the killing of oneself. BIG difference. Get it?
Doctor assisted suicide is not the same as one killing oneself. By allowing "doctor assisted" suicide you are opening the door to murder.
How do we know if both of those old folks 100% agreed to die by the doctor's hand? We do not. The paperwork is in order and that is all we have after the person is dead.
There is too much temptation for people with motives to "help" their friends, relatives agree to death, and sign the paperwork. People do change their minds. Doctors are supposed to be in favor of preserving life.